Questions and answers
Most certainly! You have my explicit permission for this. Like most of the things I create, I don't really care too much about people sharing my things.
The only thing I ask is that you keep the credits the way they are, or at least not remove my name. I won't do a witch hunt, but always assume that eventually people will find out.
In fact, it's the reason I've added a Performous download link for songs that contain rap, since I've noticed on one of the Comic Cons in the Netherlands I've been to they used Performous, and I really would love it if they would add some of the songs I've ported over to UltraStar.
Since I've made it a rule for myself to put the first note at position 0, all you need to change is the gap. The gap is essentially the amount of milliseconds until the lyrics kick in.
In order to find out what the start of the lyrics should be is to find the exact time in milliseconds when the first word is being uttered, and use that position as the gap.
If everything goes alright, the song will line up.
If you don't feel like changing the text files manually, or if you want to have a sort of live preview whether the text lines up with the song, you can also use the (experimental) song tester, which is by default visible for all songs.
Performous actually interprets freestyle notes as rap notes, actually.
To be honest, though, I mostly added it for karaoke support. Performous can be used as a regular karaoke software, where pitch doesn't really matter all that much, and freestyle lines are just displayed. As long as it can be used for karaoke setups, it's good enough for me.